Question

In what way has the geography of China affected its history?

A. The vast expanse of terrain has resulted in a unified region for the entirety of its history.
B. China's water borders and location along important trade routes have resulted in lots of contact with the outside world.
C. The Great Wall of China has provided protection from intruders since its inception.
D. China has always been vulnerable from attacks from Southeast Asia and the Korean peninsula.

Answer 1

A. is the answer because the vast has the expanse of terrain

Answer 2

It's B China's water borders and location along important trade routes have resulted in lots of contact with the outside world.